Dynamo-electric machine.



J. E. WEBSTER 32; J. LE 0. DAVIS.

DYNAMO ELECTRIC MACHINE. APPLICATION FILED MAR. 9, 1908.

Patented May 3, 1910.

2 SHEETS-8HEET 1.

ATTORNEY J. E. WEBSTER & J. LE 0. DAVIS. DYNAMO ELECTRIC MACHINE.

APPLICATION FILED MAR. 9 1908. w 95 ,554, Patented May 3, 1910.

2 SEEETSSHEET 2.

WITNESSES: vEN;0Rs 1F I 1.9%

7ATT0'RNEY UNITED STATES PATENT OFFICE.-

J'OHN WEBSTER AND JOSEPH LE CONTE DAVIS, OF PITTSBURG, PENNSYLVANIA,

ASSIGNORS, BY MESNE ASSIGNMENTS, TO WESTINGHOUSE ELECTRIC & MANUFAC-'roame COMPANY,-A ooaroan'rron or rannsnvamx.

Srmcifice tnu of Letters Patent.

DYNAMIC-ELECTRIC MACHINE.

Patented May 3, 1910.

Application filed March 9, 1908. Serial No. 420,075.

To all whom it may concern:

Be it known-that we, JOHN E. Wnes'ran and J osnrrr LaCon'ra Dav s,citizens of the United States, and residents of Pittsburg, in, thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in D namo-Elect-rie Ma- Q chines, of which the .folowing is a specification. I

Our invention relates to dynamo-electric machines having stationaryfield 'magnetwindings, and it has 5 eclal reference to railway motorsand simi ar machines which are provided with 'field magnet frames thattwo parts in a substantially horizontal plane.

' through or near the axis of its armature.

If a motor of this character is provided with interpolar magnet projectons, the interolar windings or coils are liable to be in uredi by therelative movement of the two halves 'of the frame or casing. Theforegoing statement is, of course, most applicable to railway motorshaving the usual fourpole field frame construction, since two of theinterpoles are intersected by the dividing line'of the field frame insuch cases.

'According to our present invention, we

divide the field frame of the motor in a 'lane which forms a'small anglewith the y orizontal and interpose a steel spring mem- "ber between theauxiliary magnet coils and the motor frame and also provide improvedmeans for holding the interpolar windings in osition.

igure 1 of the accompanying drawings is a artially sectional elevationof a dynamoectric machine embodying our invention, and Figs views on a.rger scale of supporting and protectingdevioes for the auxiliary coilsof the machineshown in Fig. 1.

Referring to the drawings, the device here illustrated comprises a fieldmagnetframe l .riveted to the ends of the side strips.

of the strips 21 and 22 has a flat middle portion23 and outwardly curvedside wings 2,3, 4, 5, 6 and 7 are detail '24 and'25 the-curvature ofwhich correwhich isdivided into two parts 2 and- 3 that vided with aplurality of main field magnet projections comprising relatively shortbase portions 4 which are integral with the frame 1 and havecircumferentially curved faces (3,

and removable body members 7 which are clamped against the faces 6 bybolts 8. The interpolar project-ions similarly comprise base portions 5which are integral with the frame 1 and body portions 10 which arerelatively narrow and are located in radial planes substantially halfwaybetweentwo adjacent main oles. The main and auxiiliary polar pro ectionsare respectively provided with ma netizing coils 11 and 12.. a

The free ends of the auxiliary polar projections are provided withplates 13 which are preferably formed of brass or other nonmagnetizablesheet metal punchings having lateral flanges which are secured to thepole by rivets 14 and serve to hold the coils 12 in position.

In Fig. 7 I have shown a blank from which the member 13 is formed bybending the edges adjacent to the central slit outwardly to form lateralflanges and by making rivet holes in said flanges.

Spring frames 15 are interposed between the circumferentially curvedfaces 9 of the projections 5 and the coils 12 for the urpose ofroteeting the outer surfaces o the coils on for guiding the two portionsof'the field frame together after they have been separated forinspection or for otherpurposes. As above indicated, the two parts 2 and3 are hinge-connected by projections 16 and 17 and a pin or shaft 18. a

One of the spring frames 15 is illustrated in detail in Figs. 3, 4 and5, to which special reference may now be had. Each frame 15 comprisestwo curved side strips 19 and 20 and transverse strips 21 and 22 whichare Each sponds substantially to that'of the faces 9 of the pole pieceprojeetions 5.

The frames -1'5 are located upon the respective auxiliary pole piecemembers .10,

the. spring action of the side strips 19 and .20 being such as to clampthe coil 12 against the member 13; Since the curvature of the wings 24.and 25 of the frames 15 corresponds to that of the faces 9, .the framespertaining to the auxiliary ole pieces which are located adjacent totlie plane of division of the frame 1 will serve to protect thecorresponding coils 12 from in ury and the wings 24 and 25 will insureproper engagement of the frame parts 2 and 3 as they are givenrelative'movements toward or away from each other upon the hinge 10, 17,18.

It will be understood thatmoditications in size and arrangement of partsmay be made without departing from the spirit or scope of our invention,andthat the invention is not limited to the specific type ofdynamoelectric machine illustrated.

We claim as our invention:

1. In a dynamo-electric machine, the combination with a magnetizableframe havin a plurality of main polar projectionsanil auxiliary orinterpolar pro ections secured to the frame between the mainprojections, saidframe being divided into two parts and hinge-connected,of coils for the interpolar pro ections and resilient means forsupporting the coils across the dividing plane of the field frame.

In a dynauto-electric machine, the combination with a magnetivlableframe comprising two hinge-connected parts and a plurality of polar proections, and coils mounted on the projections, of means for supportingthe coils and for guiding the frame sections when they are swung ontheir hinges.

3. In a dynamo-electric machine, the combination with a magnetizableframe comprising twohinge-connected parts and having a plurality of)olar projections adjacent to the plane of division in the frame, ofcoils for said projections and resilient means for supporting the coilsand for maintaining a predet'eriiiined relative position between the twoparts of the ame.

4. In a dyiiamo-electric machine, the combination with a field magnetframe having polar projcctions and coils, mounted on said projections,of spring frames having side and end strips which are curved in opposite6. In a dynan1oelectrie machine, the combination with a magnetizableframe divided into two hinge-connected parts, a plurality of main polarprojections secured to the frame and equally spaced on the two parts ofthe frame and. auxiliary or'inter olar dpro(jec- I tions located one oneither si e an jacent to the dividin plane of the frame, of coilsmounted on tile polar projections and i'esilieiituneaiis interposedbetween the coils on the auxiliary projections and the frame for suporting the coils and for maintaining a pre etermined relation betweenthe two parts offthe frame.

7. In a dynamo-electric machine, the oombination with a inagnetizableframe divided into two hinge-connected parts, a lurality of main )olarrojections secure frame an equal y spaced on the two parts of the frameand auxiliary or interpolar projections located one on either side andadjacent to the dividin plane of the field frame, of coils mounted onthe polar projections and resilient means interposed between the coilson the auxiliary projections and the frame for supporting the coils andto the for maintaining a predetermined relationbetwecu the two parts ofthe frame, said means comprising a substantially rectangular frame 'havmside strips and end strips bent in opposite directions out of the planeof the rectangle.

[n testin'lony whereof, we have hereunto subscribed our names this 27thday of F eb JOHN E. WEBSTER. J ()8. LE CONTE DAVIS.

W it nesses ll. 1). Drone, Bnuvm' HINES.

